cells made in san jose. in may it will begin a cross-country tour demonstrating cutting edge technologies. >> we are testing them in the air. then available for everybody to be more energy efficient, reduce fuel consumption, be cleaner. >> the solar impulse has a wing span of a 747 but as light as a mid sized car. it is expected to make it all the way across the country without using a drop of fuel. >> very cool. >> i will ride in a plane like that. >> wonder how fast? have to look that up. >> probably not so fast. >> probably not. >> here is a look at your weather as we enter the easter weekend. mostly clear skies in the east coast. showers in the middle of the country. rain later in the day for the northwest. >> temperatures will rise to the upper 60s. 87 in phoenix. 81 in honolulu. that sure does sound nice. in the sweet 16s, cities, dallas, 76, and indianapolis, 54. 50s for the majority of the cities in the northeast. >>> and all week, "good morning america" anchors have been coming face to face with their look-alikes. >> yeah, yesterday, robin roberts' turn. this is dr.